Means for driving centrifugal machines.



MIH. BARKER & C. A. ADAMS. MEANS FOR DRIVING CENTRlFUGAL MACHINES, APPLICATION FILED APR. \8: 1910.

1 146 ?67@ Yzitented July 13, 1915..

3 SHEETS-SHEET1.

M. H. BARKER & C. A. ADAMS= MEANS FOR nan me CENTRlFUGAL MACHINES.

APPLICATION FILED APH.I8,1910. 1 14%??? PatentedJuly 13, 1915.

3 SHEETS-SHEET 2.

i y, I, r I 2 Ward M! M. H. BARKER & C. A. 'ADAMS/ MEANS FOR DRIVING CENTRIFUGAL MACHINES.

APPLICATION FILED APR.18. I910.

LMQJWD v Pate11ted3u1yl3,l915.

3 SHEETS-SHEET 3.

' 1D C FORT A. ADAMS, OF CAMBRIDGE, MASSA- MELVILLE H. BARKER, OF BOSTON.

CHUSETTS, ASSIGNORS TO AME CAN TOOL 2 MACHINE COMPANY, OF BOSTON. MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

MEANS FOR DRIVING CENTRIFUGAL MACHINES.

Application filed April 18, 1910.

To all Whom it may oncern Be it known that we, lvlllLVILLli ll. Hinnm: and (loMron'r .k. limits. citizens of the United States, and residents, respectively, of Boston; in.the county of Suffolk and State of ll'lassachusetts. and of Cambridge, in the county of lvliddlesex and State of Massachusetts, have invented certain new and useful Improvements in llleans for Driving Centrifugal Machines, of which the following is a specification.

This invention relates to centrifugal inachines and is intended to provide a simple and ellicient means oi braking or stopping said machines and further to provide such a combination with an. electrically driven niachine as shall make it impossible for the operator to apply the brake while the cur rent is energizing, the motor which drives the machine.

\Vith these objects in view the invention comprises a novel arrangement and combi nation of brake with such a centrifugal machine and further consists in the combination with such a brake of an electric switch by which the control of the energizing circuit through the motor is maintained.

in the accompanying drawings we have illustrated the preferred form of embodying the principles of this invention.

In said drawings Figure 'l is a side elevation partly in central section showing the brake mechanism applied to a direct-connected electrically driven centrifugal machine. Fig. 2 is a detail view in central vertical section showing the relation of parts of the brake mechanism. Fig. 3 is a plan View illustrating the relation of the two brake elements to each other. Fig. 4 is a front elevation showing the toggle lever connection for actuating the brake. Fig. 5 is a horizontal section through the coupling member. Fig. (l is anelevation showing the interlocking brake lever and electric switch member.

In the. practice of the invention according to the embodiment thereof illustrated in the drawings, we bolt a socketed bracket 0 to the rigid ill-beams a to form a support for the centrifugal machine. Inthis'soclo eted bracket or hanger a is mounted an Specification of Letters Patent.

Patented July 13, 1915.

Serial No. 556,088.

oscillatory sleeve 7) which has a spherical bearing, ii: the socket and is provided with an internal shoulder 7) upon which is carried a suitable anti-friction thrust bearing 1/ which serves to support the upper section (1 oi the rotatable basket shaft.

The rotatable basket shaft is divided horizontally into two separable easily disconnected sections r: the basket 0 of the usual type being secured to the lower end of the lower section. The upper section terminates just below the lower end of the oscillatory sleeve 7) and the adjacent ends of the upper and lower sections are provided with enlarged heads to receive retaining bolts in order to detachably but rigidly couple the two shat't sections together. The enlarged head or flanged portion c of the upper sec tion is also screw-threaded as shown at 0 to permit the attachment of the oil cup 0 which surrounds the projecting lower end of the oscillatory sleeve 7) and also the exterior oi' the soeketed member of the hanger m. The shaft has a lateral bearing against the interior bore. of the lower part of the sleeve 1 and the oil is kept at such a level in theoil. cup as to lubricate this lateral hearing as well as to immerse the thrust hearing at l)".

brake wheel 1i, which is provided with a downwardly and inwardly extending flange portion 1. is clamped firmly between the adjacent heads of the upper and lower shaft sections by means of the retaining bolts so as to detachably but rigidly secure the same to the rotary shaft. For the purpose of radiating the heat generated by friction as rapidly as possible. the brake wheel is provided with external flanges or ribs (Z The non-rotating brake element comprises two brake shoes 0 carried by pivoted arms or levers c. which are supported by the vertical pivot post which passes through the perforated flanges 0 formed at the rear of the brake arms. Each brake arm as shown is provided with two such perforated flanges (2 so that the outer ends of the brake arms of the toggle arms 6 are engaged by ver- 'tically' movable rod 6, which by its downward movement thrusts apart the free ends of the arms 6'' so as to exert a powerful pres,- sure of the brake shoe against the interior face of the brake wheel .2. When the rod 6 is lifted, the toggle members are flexed and thecontractile spring 6 serves to draw the brake shoes out of engagement with the lorake wheel. I

y The means shown for actuating the toggle rod 6 comprise the link member e pivotally connected with the arm e secured to the rock shaft 0 and to the latter is rigidly fastened the hand-operated brake lever o which is preferably provided with an aoijustable stop screw 6 adapted to engage against the lower rib of the l-beam a or any suitable stationary member, so as to limit the downward movement of the brake lever iii order to prevent the toggle from being forced beyond the point of dead center.

mien the brake is employed on an elec:

\ electrically connected contact fingers cl which are adapted to register with and engage a corresponding pair of contact fingers (2 located on the insulating plate (Z sothat when the disk (5 is rotated in a contra-clockwise direction, the circuit through the electro-magnet (Z is closed but when it is rotated in a clockwise direction said circuit is broken. The closing of the circuit through the magnetzl acts upon a solenoid switch member, conventionally shown at al to close the contacts (Z of the main circuit which passes through the electric motor to enerdriven mmnhcr g'. while allowingthc basket shaft to oscillate freely with rcfm'cnce to the motor shaft 7" without bringing: lateral strain upon the llfilll'llllfih cl the motor shaft.

This result is secured by carrying a longhight or loop of the driving, bolt through openings termed in the outer driving memincis ve? her g, the loop or "eight being carriedbaclr from this opening in a direction nearly parnllel to the periphery of the outer member itself a sulficientdistanceto pass around a section or portion of the inner driven member g. The other belt is formed into similar open loops or bights extending in the re verse direction so as to prevent back-lash while allowing complete freedom of. oscillation of the members .7, 9 within the limits necessary for the proper action of the ma chine. The brake wheel is errangedin the horizontal plane of the center of oscillation of the sleeve and also in the plane of the rotary hearing, so that it has the minimum amount of oscillation at thepoint where the brakand lower sections of the basket shaft, the

brake wheel can be dropped clear of the rest .oi the apparatusaffording free access to the brake shoe members and to the oil cup which it normally surrounds.

111 Fig. 6' the brake lever is shown at its lowermost position. at which point it acts to set the brake shoes with the greatest force against the brake wheel, while in this position it is impossible to throw the electric switch oi by reason of its engagement at 03 with the brake lever. The raisingof the brake lever releases the brake and makes it possible to close the switch in Order to energize the motor and start the machine in operation. H the brake be applied when the switch is in closed position, this same en-- gagement'serves to cause'the rotation of the switch member (Z in order to separate the contacts at (2* d before the brake comes into action. llhen the brake is in inoperative position, the switch may be thrown in either direction. The fixed stop a engaging the notched portion of the disk d serves to limit the extent of its rotation.

What we claim is: i

1. The combination with the gyratory centrifugal shaftof an electrically driven motor, brake elements arranged to arrest the rotation of said shaft, an actuating lever for setting," and-releasing said brake mechanism, on electric switch and its actuat:

ins lever for controlling" the admission of current to the motor, the brake-lever and the switch lever being capable of. independent movement and interlocking connections by which the switch ishehl in open position and is moved to open position when the brake is set. substantially as described.

The combination of the suspended rotary centrifugal basket shaft. an electric motor for driving the same. brake mechanism for arre tingthe movement of the shaft, anv

actuating lever to: said brakemechanism, a. a

pa rtially rotatable switch element it's m'm' :HH'HUIH! adjacent to said b Mic level, Hm switch aah-uwnt and the brake haven being indqwnrlvmly miutubie and hiakng arranged Sn thni the brain: lm'm' when in npumt wu 5msit iun nbstrmztsfln: rotation 01" the switch 'xm-mhvr into operative posiiion, substan- .Zn wSLm-ss whereof we have subscribed th 26mm spirui fiuntizm'.

JECLVZLLEQ BARKER. (,UMFUZQT A. AI AMS. in Hue mesa-11cc nf--- (hm. DJ. (iommm, ilrumyuzimn A. 513mm. 

